global warming

Scientists warn that global warming is causing Arctic ice to melt at an alarming rate.

(Chinese) 科学家警告说，全球变暖正导致北极冰川以惊人的速度融化。

Many coastal cities are threatened by rising sea levels caused by global warming.

(Chinese) 许多沿海城市正受到全球变暖导致的海平面上升的威胁。